11.24: Two wave pulses qtui4v0or;ei 6 b7 gbrg 4+,ly(bdj-htravel to the right toward a rigid boundary as shown. After reflection rb6+rbdqu(ij0,ihblt -v4 o;e7 yg 4gof the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the su;bgui rw9.3to((xh) umufth5 rface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transmitted wavemt5(f.9( h uubu3)wo rgxti ;h?

  12.02: A ray of light passes straight downward through the point labeled B in )jdq p)5 k, 76 d4q5nurx nrz*vka2izrthe diagram shown. The ray reaches a flat mix2aqqkrnv5 p6ji5d)rz4 r*,7k) duznrror placed at an angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occurs whenever light is in irv6w ((niw yb( bzvh.k6m- qmim3.*nbk u,c2cident on

  05.18: A student hold a hand mirror to observe the backzvq k+97.v0,h mk kmlk of her head while standing in front of and looking into a wall mirror. If she is standing 4 ft in front of the wall mirror and she holds the hand mirq 7kvkkm.0lvhzm+, 9 kror 1 ft behind her head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light ray changes direction when it en44vay )y4ym)bcmf 6xdters a new material. Which one of the following ch)dcfx4 b)y6 ya44m vymoices is the term best associated with this phenomenon?

  96.19: Light that has wavllmef.)1dk u0g d.f 0jelength of 500 nm in air has wavelength 400 nm in a transparent material. What is the index of refraction of the materi1l )d00kdm e.l.uj fgfal?

  98.04: As sound travels from steel into air, both its speed av-byz0+x..dk)llplk kiq o m,+ /osgvj2 17lf nd its:

  00.01: As a wave moves from one me4sknfei tg8lw*ielu;98 ss*8 dium to a second medium with a different index of refractionw88 * elss isgftl98iuek4 n*; which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency trav5/+ptu 6 :ixqjw5 xkwoels from air (with sp:6w+5uiwkx x/o t5qpjeed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimmingc1 zos ua0g ,rs.e4u;t53xkuh pool emits a sound wave that travels towrzou ku04s,he51 ust ;a cg3.xard the surface of the water. In the water, the sound wave has a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst of white light strikes a xq 9gfxws46 2 jwpir49rectangular glass block with an angle of incidence of xip92 js64rgxwf q49w $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward a point P on .;( tguia/ufea boundary as shown to the right. Which segment best represents the refra f/iat(gue;u. cted ray?

  98.17: Which diagram bestd8 0e qe4i7cw; ehy0hx represents what happens to a ray of light entering air frowheyc 087ee dq4i;0xhm water? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence for wh-o hp.g mh 5ku)j)eyv6ich the kyvo6h-) .) gpue5h mjangle of refraction is:

  95.12: The principle underlying fiber optics iswbz6 ym 4wzt0t osx::):

  98.36: The critical angle in a transparent substance surrounded by eh+d( xhhxg/*k8;yntair is $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from(f5y; vy 5-2;cpnp 6jlu saqryxpe s0 /7i-itj material X with an index of refraction of n = 1.5 to material Y with an index of refraction5iup;/ t0yv2c6x fjsjepylp( iya -7r; q -5ns of n = 2.0. If the speed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamounpcx4p- gb3 ;nd and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refraction of 1.52 has a critical n- gpx4u3;c bpangle of $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines from air into a clear material. When thess./*vcm9 dbj light makes an angle of incidence equal to v9.sbdj *csm/$30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic laser is embv rn* nenz - uz(g.2gpby1fs+*edded in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the posizr-bv2su fg n *pyn* .(1+zgention parameters of the laser and target. The value of n is:

  95.31: A beam of light p 4 w1rpozhx(zqy3)wec h,(bk2asses from medium 1 to medium 2 to medium 3 as shown in the accompa rok2 1zy,4hh3q)wexzwp (b( cnying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium )d9x/dgcs w f43 as shown in the diagram. What may be concluded about the three indexes of refra)c/f4x9s dgdw ction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that ;)u ;s ag*qy) scd7jdea light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices ud)g yq*aj)sc ;d7se;of refraction?

  09.34: The diagram below shows the path taken by a monochromatic light ray trave zg/at dzeb7k,3ef2x--lp o esd)u(l(g );fpqling through three media.The sym;g(dg oppe3/-(dft)axls b)u2-q7lfzk eze ,bols $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of light traveli4 dtiys)9z9a(pjwuo ,7 1nxbb ng in glass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light is incident on the surface of a rectangular block of glsb +v,i. 7/osssro ;q;ueyw;pj6 awb )e.fiz0 ass at an 07 swvu e.;oz; f siy.a+ ewpsb;)s6broijq/,angle of $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm is transmitted from air into a pi6 zbzwq9j1 :uii3g cz;wk9s 9zece of glass. Which one of the labeled arrows best indica13j:9;9zwqzzu i6g9 swkz ibctes the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangu*o(tk.1 ndy lh9 km9vblar glass as shown. The glass has an index of refraction of 2.00 and it is surrou*(1ol tm.ndk vh9k9ybnded by air. Which one of the lettered rays shows the path of the light after it exits the glass?